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artificial star
Hi
Im trying to collimate my telescope with a hubble artifical star
i find i cant get the airy disk just the donut only - wont focus any further
its rougly abt 20 mters away
has anyone experience with these - My telescope is an 11 inch celestron CPC GPS
im thinking i might be too close would that be correct ?
any pointing in the correct direction would be appreciated.
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